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Facet engineering for improved carrier separation and transport in CuFeO2 photocathodes.
- Source :
-
Materials Chemistry & Physics . Jan2024, Vol. 311, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- The development of CuFeO 2 photocathodes is hindered by challenges associated with low carrier separation and transport efficiency. In recent years, facet engineering has emerged as a promising solution to overcome these limitations. In this study, CuFeO 2 samples with varying crystal facets and morphology were successfully synthesized through precise control of hydrothermal reaction time, ultrasonic time, and the introduction of a surfactant. Among the synthesized samples, the nanosheet CuFeO 2 exhibited an impressive 83.36% exposure ratio of (001) facets and demonstrated the highest photocurrent density of 5.3 μA/cm2 when compared to both cubic CuFeO 2 with (012) facets and octahedral CuFeO 2 with (001) facets. The exceptional photoelectrochemical performance of the nanosheet CuFeO 2 can be attributed to the polar nature of the (001) crystal plane, which induces a surface polarization effect. This effect significantly enhances the separation efficiency of photoexcited electron-hole pairs. Additionally, the nanoscale dimensions of the CuFeO 2 nanosheets minimize carrier diffusion distances, leading to improved carrier transport efficiency. Overall, this study highlights the feasibility and immense potential of employing facet engineering as a strategic approach for enhancing the photoelectrochemical performance of CuFeO 2 photocathodes. The successful synthesis of CuFeO 2 samples with optimized crystal facets opens up new avenues for advancing the development of efficient photoelectrochemical devices. • Facet engineering offers new possibilities for enhancing the performance of CuFeO 2 photocathodes. • Nanosheet CuFeO 2 exhibits the highest photocurrent density of 5.3 μA/cm2 among the synthesized samples. • The nanosheet CuFeO 2 has an impressive 83.36% exposure ratio of (001) facets. • The polar nature of (001) crystal plane of nanosheet CuFeO 2 enhances carrier separation. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PHOTOCATHODES
*CRYSTAL morphology
*ENGINEERING
Subjects
Details
- Language :
- English
- ISSN :
- 02540584
- Volume :
- 311
- Database :
- Academic Search Index
- Journal :
- Materials Chemistry & Physics
- Publication Type :
- Academic Journal
- Accession number :
- 173315762
- Full Text :
- https://doi.org/10.1016/j.matchemphys.2023.128582